Marceline and Kira already had a strategy on how they would search the whole house just to find the Ametiz stone.
In fact, the two had an argument before going to the Zhou Family Villa. Marceline was aware that Kira couldn't touch the stone so she volunteered that she would be the one to search for it.
Though she had an allergic reaction to Ametiz Stone, she thought she could endure it as long as she would take the medicine coming from Aunt Brianna.
But Kira opposed that idea as he knew that Marceline's wolf, Stella, would be hurt and affected by Ametiz Stone. Marceline was clueless about this fact.
So Kira suggested that since he was the fastest between them, he should be the one to search the whole house while Marceline would try to keep the other members of the Zhou Family busy and occupied.
